diff --git a/.gitignore b/.gitignore
index f890d67..50b2aef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -156,3 +156,5 @@
 /thunderbird-langpacks-128.11.0esr-20250526.tar.xz
 /thunderbird-128.12.0esr.processed-source.tar.xz
 /thunderbird-langpacks-128.12.0esr-20250630.tar.xz
+/thunderbird-128.13.0esr.processed-source.tar.xz
+/thunderbird-langpacks-128.13.0esr-20250721.tar.xz
diff --git a/sources b/sources
index 0eb7882..2cd1603 100644
--- a/sources
+++ b/sources
@@ -2,5 +2,5 @@ SHA512 (nspr-4.35.0-1.el8_1.src.rpm) = 5123a443fcc42602e31104999be339ae899eb7b1f
 SHA512 (cbindgen-vendor.tar.xz) = 0c7a40033ccd38dadd30ad064feef390444af4562be07d3dfd0c4cccc55821b01b5228ddee367d0af3bd1b4ef9b1552cdd104506579b020ac1940a7c536b8b68
 SHA512 (nss-3.101.0-7.el9_2.src.rpm) = 7c325e0e437c1266031af02b3a026d20b789548ae435be6c39d710aa9d19c967ac0a79097fd50dd8ab878bf0d72c19e937d54863aa8cd0654ef2ef288e3102ec
 SHA512 (nss-3.101.0-7.el8_2.src.rpm) = c25551b06cf9239bb54aaf3edaea2c60804b449de4e06af4f5192bc181b5c6468ea8a69ddeff9de1b11bfc123e894b1ce8fc5d6deddfd5062f8736b75db56f8d
-SHA512 (thunderbird-128.12.0esr.processed-source.tar.xz) = 14f140b618195c61b0038742b93925799c7e916387c51a4d0d89740312ec92ad15d69f68d5314472b1094e21e8efbee706daa7894c7034233048e6268d771a37
-SHA512 (thunderbird-langpacks-128.12.0esr-20250630.tar.xz) = d10960bb709ced33a2738953d8d997e87bbe385982b4cba7b060a0e8c4e62f480b76f8e7dea47b8d4f7fb045339ff152c36f155a97aa309da53dc7f6935c23ed
+SHA512 (thunderbird-128.13.0esr.processed-source.tar.xz) = 64e503c97b60417d6b77cc740108839675a3924addeaf3107213202ffe74378ef7b51801e68bc5f40f5d0215128e6ffdb09a729892ae5a8ab87ca26bdb767581
+SHA512 (thunderbird-langpacks-128.13.0esr-20250721.tar.xz) = 27d8f1f0d751a51ddd1531972852630de1691770cd1cccba61cc201586f5814ff88a775708439f1eb1bfab1dbb98da64b8d1ba24e79a772540296c38e2e535fa
diff --git a/thunderbird.spec b/thunderbird.spec
index f49afd3..8a51860 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -137,7 +137,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        128.12.0
+Version:        128.13.0
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -165,7 +165,7 @@ ExcludeArch:    %{ix86}
 #Source0:        https://archive.mozilla.org/pub/thunderbird/releases/%%{version}%%{?pre_version}/source/thunderbird-%%{version}%%{?pre_version}.processed-source.tar.xz
 Source0:        thunderbird-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{with langpacks}
-Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20250630.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20250721.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1658,6 +1658,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Jul 21 2025 Eike Rathke <erack@redhat.com> - 128.13.0-1
+- Update to 128.13.0 build1
+
 * Mon Jun 30 2025 Eike Rathke <erack@redhat.com> - 128.12.0-1
 - Update to 128.12.0 build1